Chase Ink Bold Ultimate Rewards Business Card offers 50,000 points ($500) Sign-Up Bonus after $5,000 in purchases. The card offers flexible spending limits and requires you to pay off your balance in full each month. The annual fee of $95 is waived for the first year. I sell items on eBay and Craigslist so I applied for a business card under sole proprietorship with my name as business ID and Social Security number as tax ID.

The Continental OnePass® Plus airline rewards MasterCard by Chase offers up to 40,000 bonus miles and perks such as fee waivers and free upgrades on flights. You’ll get 25,000 bonus miles after your first purchase and another 5,000 bonus miles for adding an authorized user, that’s enough for a free round-trip ticket. There is no annual fee for the first year, a savings of $95.

The Chase United MileagePlus Explorer Card gives you up to 40,000 bonus miles with loaded benefits. They include waived fee bag check for all card members + one guest, priority boarding, and free access to the United Club – a $100 value. No annual fee for the first year and $95 thereafter.

Probably the best card to earn frequent flyer miles, the Starwood Preferred Guest® Credit Card from American Express gives you 10,000 bonus Starpoints after first purchase. This can be converted to $100 gift card. Earn one Starpoint for every dollar you spend. No annual fee for the first year; $65 thereafter.